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  2. Ringing tone - Wikipedia

    en.wikipedia.org/wiki/Ringing_tone

    Ringing tone (audible ringing, also ringback tone) is a signaling tone in telecommunication that is heard by the originator of a telephone call while the destination terminal is alerting the receiving party. The tone is typically a repeated cadence similar to a traditional power ringing signal (ringtone), but is

  3. Ringback number - Wikipedia

    en.wikipedia.org/wiki/Ringback_number

    In the 1970s and early 1980s, 1199011 was a number that when called would result in another dial tone. Afterwards, if the phone was hung up and then quickly picked up again in less than approximately 1/2 second (ie: a hook flash), a steady tone would then be heard (different from a regular dial tone). Hanging up the phone after this would ...

  4. Automatic number announcement circuit - Wikipedia

    en.wikipedia.org/wiki/Automatic_number...

    The specifications define several test features for line conditions, such as quiet line and busy line, and test tones transmitted to callers. Telephone numbers are assigned for ring back to test the ringer when installing telephone sets, milliwatt tone (a number simply answers with a continuous test tone ) and a loop around (which connects a ...

  5. Automatic callback - Wikipedia

    en.wikipedia.org/wiki/Automatic_callback

    Comdial ExecuTech System 2000 Make an intercom call. At the busy signal, dial "*6". Hang up. When the desired extension becomes idle, the calling telephone receives five tone bursts. To answer callback rings, lift the handset. The called telephone will ring. To cancel auto call back before it rings, press "ITCM", dial "#6" and hang up.

  6. Ringback - Wikipedia

    en.wikipedia.org/wiki/Ringback

    Ringing tone, also ringback tone, the audible ringing that is heard by the calling party after dialing; Ringback number, a number used by phone companies to test whether a telephone line and phone number is working; Automatic ring back, a telephone feature to notify the caller when the called party ceases to be engaged

  7. AT&T phones now show when calls come from verified numbers - AOL

    www.aol.com/news/2019-12-18-att-call-validation...

    AT&T is making good on its promise to validate calls and fight robocallers. The carrier has enabled validation displays that let you know when a call really did come from a given number.

  8. AOL Dialer: Fix common problems - AOL Help

    help.aol.com/articles/aol-dialer-fix-common-problems

    First, turn off call waiting from Dialing options and make sure your modem phone line has dial tone. Also, try using a different access code. If you’re still having trouble, please call our customer support at 1-800-827-6364.

  9. Ringing (telephony) - Wikipedia

    en.wikipedia.org/wiki/Ringing_(telephony)

    Ringing is a telecommunication signal that causes a bell or other device to alert a telephone subscriber to an incoming telephone call.Historically, this entailed sending a high-voltage alternating current over the telephone line to a customer station which contained an electromagnetic bell.